io.micronaut.health.HeartbeatDiscoveryClientCondition Maven / Gradle / Ivy
/*
* Copyright 2017-2020 original authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.micronaut.health;
import io.micronaut.context.ApplicationContext;
import io.micronaut.context.condition.Condition;
import io.micronaut.context.condition.ConditionContext;
import io.micronaut.core.annotation.Introspected;
import io.micronaut.core.convert.ArgumentConversionContext;
import io.micronaut.discovery.CompositeDiscoveryClient;
import static java.lang.Boolean.FALSE;
/**
* Custom condition to conditionally enable the heart beat.
*
* @author graemerocher
* @since 1.1
*/
@Introspected
public final class HeartbeatDiscoveryClientCondition implements Condition {
@Override
public boolean matches(ConditionContext context) {
final ApplicationContext beanContext = (ApplicationContext) context.getBeanContext();
final CompositeDiscoveryClient compositeDiscoveryClient = beanContext.getBean(CompositeDiscoveryClient.class);
final boolean hasDiscovery = compositeDiscoveryClient.getDiscoveryClients().length > 0;
if (hasDiscovery) {
return true;
} else {
final Boolean enabled = beanContext.getProperty(HeartbeatConfiguration.ENABLED, ArgumentConversionContext.BOOLEAN).orElse(FALSE);
if (!enabled) {
context.fail("Heartbeat not enabled since no Discovery client active");
}
return enabled;
}
}
}